JPH1083608A - Disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clamp or eject a large or small disk to or from a disk driving mechanism even when these large and small disks are inserted from the same inserting hole respectively by making one pair of positioning members movable to fit the large and small disks, respectively. SOLUTION: Arms 31 and 32 are provided with a spring member 37 for pulling the one pair of positioning members, i.e., contact pins 35 and 36 to approach each other. That is, when the small diameter disk is inserted, this small diameter disk is supported by a stopper member 30 with the contact pins 35 and 36 in a forward part. Then, when the large diameter disk is inserted, the contact pins 35 and 36 are moved backward to support the large diameter disk. Then, an engagement pin 42 is engaged with stepped parts 33a and 34a, so that the arms 31 and 32 are held to be in the lock state. A holding releasing mechanism consisting of levers 41 and 44 is for releasing the lock state, and this releasing operation is performed by pressing a clamp releasing pin 28 against the engagement lever 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk player such as a compact disk player and a video disk player, and more particularly to a disk player which can drive disks having different diameters with the same disk player.

[0002]

2. Description of the Related Art Conventionally, compact discs generally have a relatively large diameter (usually 12 cm) on which a plurality of songs are recorded. However, with the spread of CD players in recent years, compact discs have a smaller diameter. Discs that record 2 to 3 songs, usually 8 cm 2, so-called CD singles have become widespread, and there has been a demand for the development of a CD player that can play both the large-diameter disc and the small-diameter disc. Conventionally, when a disk having a different shape is inserted from the same insertion slot and used, an adapter 1 as shown in FIG. 20 is used.
The adapter 1 is formed to have the same diameter as a large-diameter disk, and has elastically expandable support arms 3 at several locations. The small-diameter disk (S) is a support arm 3
Are clamped by the clamp projections 4 provided on the rim.
The adapter 1 is inserted through the insertion slot of the CD player so that the small-diameter disc (S) can be securely clamped to the turntable.

[0003]

However, by attaching a small-diameter disk to the adapter 1 as in the prior art,
When inserted from the insertion slot of the D player, a kerf portion 3a existing between the support arm 3 of the adapter and the base disk 2
(A groove for allowing the support arm 3 to elastically expand) may pass over the light detecting means for detecting the insertion of the disk during the loading of the disk. In this case, erroneous detection is performed by the detection means, and the disk loading operation is stopped halfway, and a problem occurs such that the disk cannot be mounted at a predetermined position or cannot be ejected. Further, a general user thinks that a small-diameter disc can be used as it is. When a small-diameter disc is inserted through an insertion slot, the disc cannot be ejected, and the CD player itself cannot be used.

[0004] The present invention is to solve the above problems,
Even if discs of different diameters are inserted from the same insertion slot, disc players with different diameters can be reliably clamped to the turntable of the disc drive mechanism and ejected reliably. It is intended to provide.

[0005]

According to the present invention, there is provided a disk player comprising: an introduction portion into which disks of different diameters are introduced; a disk drive mechanism capable of installing disks of different diameters; A disk feed mechanism that can transfer the disk to the disk drive mechanism even when the disk is of a small diameter, and waits at a position where the introduced small diameter disk can be positioned on the disk drive mechanism. A pair of positioning members for moving a disk to a position where the disk can be installed on the disk drive mechanism, a holding mechanism for holding the positioning member with the large-diameter disk installed on the disk drive mechanism, and holding by the holding mechanism And a holding release mechanism that allows the positioning member to return to the standby position by releasing the position. .

Further, for example, the pair of positioning members can move from the standby position toward the back of the apparatus when pressed by a large-diameter disk receiving the feed force of the disk feed mechanism. In a state in which the large-diameter disk is supported on the disk drive mechanism, the pair of positioning members are located on the inner side of the apparatus with respect to the center of the disk and held by the holding mechanism. .

An urging member for maintaining the positioning member at the standby position is provided, and when the holding by the holding mechanism is released, the urging member moves the standby position relative to the positioning member. It is preferable to apply a return force toward the bottom.

In this case, the urging force when the urging member keeps the positioning member at the standby position is larger than the feeding force applied by the disk feeding mechanism to the small-diameter disk, and is larger than the feeding force applied to the large-diameter disk. It is preferable that the positioning member is set to be small and the positioning member can be moved to the rear side of the apparatus by this feeding force when the disk feeding mechanism feeds a large-diameter disk.

Further, the disk drive mechanism has a turntable that is driven to rotate, and a clamper that presses the center of the disk on the turntable, and the driving force that moves the clamper in a direction away from the turntable causes the disk drive mechanism to rotate the disk. It is possible that the holding release mechanism is operated to release the holding.

[0010]

The above technical means operates as follows. When the small-diameter disk is introduced, it is fed by the disk feeding mechanism and hits a pair of standby positioning members, is positioned on the disk drive mechanism, and the small-diameter disk is driven. When a large-diameter disk is introduced, the disk is also fed into the apparatus by the disk feed mechanism. At this time, a pair of positioning members move from the standby position to the back of the apparatus, and the large-diameter disk is moved. Is set in the disk drive mechanism. The positioning member is held by the holding mechanism in a state where the large-diameter disk is set on the disk drive mechanism, so that the positioning member erroneously applies a return force to the driving large-diameter disk. There is no.

When a large-diameter disk is introduced, the positioning member can be moved from the standby position by being pushed by the large-diameter disk receiving the feeding force from the disk feeding mechanism. A mechanism for moving the member can be easily configured. Further, when a large-diameter disk is installed on the disk drive mechanism, if the positioning member is held at the back side of the apparatus with respect to the center of the disk, a pair of positioning members are used when ejecting the disk. Evacuation from the disc ejection path becomes unnecessary.
In addition, when the urging member for urging the positioning member to a position where the small-diameter disk can be positioned is provided, when positioning the small-diameter disk, the positioning member does not rattle and the positioning accuracy is high. it can. Also,
When the holding of the positioning member is released, the positioning member can be reliably returned by the urging force of the urging member.

In this case, if the urging force for maintaining the positioning member at the standby position is set to be larger than the feeding force applied to the small-diameter disk, the disk can be surely moved when the small-diameter disk hits the positioning member. When the positioning member is set to be smaller than the feeding force applied to the large-diameter disk, an operation of pushing the positioning member toward the back of the apparatus by the large-diameter disk can be realized. Further, when the holding of the positioning member is released by the operation of releasing the clamp, the timing of the release of the clamp and the operation of returning the positioning member to the standby position can be set with high accuracy.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a front view showing the operation unit of the disc player. In this figure, reference numeral 11 denotes an operation panel. The operation panel 11 includes a display 13 including a liquid crystal display element for performing various displays, and a plurality of types of disks having different diameters such as a small-diameter disk (S) and a large-diameter disk (L). Insertion port 1
2 are provided. The operation panel 11 is attached to the front of the player main body (H), and is connected to the player main body (H).
Each of the functions can be operated. The player body (H) will be described in detail with reference to FIGS.

FIG. 2 is a plan view of the apparatus main body (H), and FIG. 3 is a side view thereof. In FIGS. 2 and 3, reference numeral 14 denotes a drive roller whose diameter gradually increases toward both ends so as not to pinch the center of the large-diameter disk (L). One end of the drive roller 14 is pivotally supported by one side chassis 15a, and a gear 16 is attached to the other end. As shown in FIG. 3, the gear 16 meshes with various gears 18, 18,... For transmitting the rotational force of a motor 17 provided on the other side chassis 15b. Then, the driving roller 14 is driven.

The opposing side of the drive roller 14 is a plastic opposing member 14a as shown in FIG. 5 and FIGS. 19 (a) and 19 (b), and the disk is fed between the drive roller 14 and the opposing member 14a. A mechanism is configured. The lower end of the opposing member 14a is concave upward at the center. This concave shape is opposed to a change in the diameter of the drive roller 14. As shown in FIG. 5, the drive roller 14 presses the disk with the opposing member 14a with a predetermined spring pressure during the disk pull-in operation, and escapes downward as indicated by the dotted line after the disk is completely inserted. It has become.
The opposing member 14a does not rotate, and the disk fed by the drive roller 14 simply slides. However, it is also possible to use a roller having a shape in which both ends are gradually thickened, like the driving roller 14, as the facing member 14a.

In the disk pull-in operation by the drive roller 14 and the opposing member 14a, when a large-diameter disk (L) is used, as shown in FIG. It is designed to be driven at the thickest position. Therefore, the large-diameter disk (L) can be strongly pinched by the clamping force of the spring pressure between the driving roller 14 and the opposing member 14a, and the disk is drawn in by a stronger driving force. When the small-diameter disk (S) is used, the small-diameter disk (S) is driven at a narrow position on the center side of the drive roller 14 as shown in FIG. Cannot be strongly pinched.
Therefore, the disk is pulled in with a smaller force than the driving force for driving the large-diameter disk (L).

Reference numeral 20 denotes a disk drive unit (disk drive mechanism). The disk drive unit 20 is supported by four vibration absorbing dampers 19a and 19b (two not shown) attached to both side chassis 15a and 15b. Due to the presence of the damper, the disk drive unit 20 is protected from vehicle body vibration and impact when used in a vehicle. As shown in FIG. 4 (plan view) and FIG. 5 (side view), the disk drive unit 20 is an optical pickup mechanism 21 that picks up a signal written on the small-diameter disk (S) or the large-diameter disk (L). Turntable 2 for rotating disk (S) or (L) on lower chassis 22 provided with
3 are attached.

The upper chassis 25, which is rotatably attached to one end of the lower chassis 22 and is always drawn toward the lower chassis 22 by a spring 24, has a disk (S) or (L) mounted on a turntable 23. ) And a restricting piece 27 for restricting the clamper 26 from descending onto the turntable 23.
Are provided. The regulating piece 27 has a standby portion 27a for tilting the upper chassis 25 upward and waiting until the disk (S) or (L) is pushed onto the turntable 23, and is adjacent to the standby portion 27a. An inclined portion 27b is provided, and the release pin 28 for releasing the clamp slides on the inclined portion 27b when the disc (S) or (L) is ejected. ing. The release pin 28 is connected to the side chassis 1
5b is driven in the left-right direction of FIG. 5 by a rack mechanism or the like that meshes with one of the various gears 18, 18...

The release pin 2 is located at the position indicated by the solid line in FIG.
8, the upper chassis 25 is lifted to release the clamp. When the release pin 28 moves rightward as shown by the dotted line in FIG.
The disc moves downward by the force of 4, and the disc is clamped. A stopper is provided on a surface of the upper chassis 25 facing the lower chassis 22 (that is, a lower surface of the upper chassis 25) to prevent the disks (S) and (L) from entering a depth from a predetermined position. A member 30 is provided. This stopper member 30 is, as shown in FIG.
The two arms 31 and 32 are partially overlapped and symmetrically arranged. At the position where the arms 31 and 32 overlap, the
A rotation shaft 29 that serves as a rotation center of both the shafts 32 and 32 passes through the shaft. Further, an elongated hole 33 having a step portion 33a on the arm 31 side and an elongated hole 34 having a step portion 34a on the arm 32 side are provided at positions where the arms 31 and 32 overlap. A holding release mechanism, which will be described later, engages with both the long holes 33 and 34.

The arm 31 is provided with a contact pin 35 as a positioning member that projects toward the lower chassis 22 and directly contacts the disk (S) or (L).
Similarly, the arm 32 is provided with a contact pin 36 as a positioning member that directly contacts both disks. Arm 3
1 and 32 are provided with a spring member 37 so that a pair of positioning members, that is, contact pins 35 and 36 are attracted in a direction approaching each other. As shown in FIG. 4, when the two contact pins 35 and 36 are located closest to each other by the spring member 37, the distance between one contact pin 35 and the side chassis 15a (see FIG. 2) is small. (S), and the distance between the other contact pin 36 and the side chassis 15b is also set to be smaller than the distance from the disk (S).

As shown in FIG. 6, when a small-diameter disk (S) is inserted at a position deviated from the center of the insertion slot 12, the disk (S) comes to a position where it hits both contact pins 35 and 36. It is to be led. Further, the spring member 37 is stronger than the driving force when the driving roller 14 pushes the small-diameter disk (S) and is weaker than the driving force when the driving roller 14 presses the large-diameter disk (L). Are set so that the arms 31 and 32 attract each other. That is, when the small-diameter disk (S) is inserted, the stopper members 30 support the small-diameter disk (S) in front of the small-diameter disk (S), and when the large-diameter disk (L) is inserted, the contact pins 35 and 36 are provided. And 36 can be moved rearward to support a large diameter disk (L) at the rear.

Here, the holding mechanism and the above-described holding releasing mechanism will be described with reference to FIGS. 4 and 5. FIG. 41
Is an engagement pin 42 which is inserted through the above-mentioned slots 33 and 34.
At one end. This support lever 4
1 has a notch 22a provided in the lower chassis 22 at the other end.
Shaft 43 extending downward from the lower chassis 22
Are provided, and the support lever 41 rotates around the extension shaft 43.

Reference numeral 44 denotes an engagement lever which is arranged so as to be always orthogonal to the support lever 41 and which rotates integrally with the support lever 41 about the extension shaft 43.
The engaging lever 44 is connected to the clamp release pin 28 described above.
Engage with. One end of the engagement lever 44 has a curved portion 44a that is bent approximately 45 degrees toward the clamp release pin 28, and a first fold bent downward on a side of the curved portion 44a facing the clamp release pin 28. A bent portion 44b and a second bent portion 44c which is bent forward and downward by about 45 ° in parallel with the length direction of the clamp release pin 28 ahead of the first bent portion 44b are provided. I have. In addition, the engagement lever 4
A spring member 45 having one end fixed to the lower chassis 22 is attached to 4, and the engagement lever 44 and the support lever 41 are constantly urged in the direction of the arrow x by the spring member 45.

A holding mechanism is constituted by the engaging pin 42 and the steps 33a, 34a. When a large-diameter disc (L) is used, the engaging pin 42 is provided in each of the slots 33 and 34. The arms 31 and 32 are held and locked by engaging with the stepped portions 33a and 34a. The holding release mechanism composed of the levers 41 and 44 is for releasing the locked state with the ejection operation of the disks (S) and (L). This release operation is performed by the clamp release pin 28 that moves during the ejection operation of the disk pressing the engagement lever 44.

A description will now be given of a disc loading operation and a discarding operation of the disc player according to the present invention described above.
When a small-diameter disk (S) is used, FIGS.
As shown in FIG. 1, the arms 31 and 32 are attracted to each other by a spring 37, and the support lever 41 and the engagement lever 44 rotate clockwise, that is, from the initially set standby position. I have. Therefore, the contact pins 35 and 36 as the contact members move to the insertion port 12 side and are on standby.

At this time, when the small-diameter disk (S) is inserted, and is nipped and pulled by the drive roller 14 and the opposing member 14a, two points on the outer periphery of the disk (S) are brought into contact with the contact pins 35 and 36. Hit. The small-diameter disk (S) is driven by the drive roller 14 and the opposing member 14a as shown in FIG.
(A small diameter portion of the drive roller 14), the feed force is weak. Therefore, when the disk (S) hits the contact pins 35 and 36, the arm 31
And 32 remain attracted by spring 37.
Therefore, the small-diameter disk (S) is positioned by the contact pins 35 and 36, and the center of the disk (S) is made to substantially coincide with the turntable 23.

When the detection means detects that the disk (S) has moved to this position, the release pin 28 is driven in the y direction in FIG. 4 by the driving force of the motor. Therefore, the release pin 28 separates from the restriction piece 27 (see FIG. 5), the upper chassis 25 lifted by the release pin 25 is lowered by the force of the spring 24, and the disk (S) is clamped by the clamper 26 and the turntable 23. Is done. In conjunction with this operation, the drive roller 14 descends to the position shown by the dotted line in FIG. When the disc (S) is ejected, the release pin 28 is driven in the direction opposite to the y direction,
The release pin 28 lifts the upper chassis 25 to release the clamp. Further, the drive roller 14 moves up, and the disk (S) is ejected to the insertion slot 12 by the rotating force of the drive roller 14.

When a small-diameter disk (S) is used as described above, since the engagement lever 44 is at a position rotated clockwise, the release pin 28 is moved along with the operation of loading and discharging the disk. When driven in the left-right direction in FIG. 5, the release pin 28 simply passes through the side of the engagement lever 44. When the large-diameter disk (L) is used, as shown in FIGS. 12 to 18, when the large-diameter disk (L) comes into contact with the contact pins 35 and 36 at the standby position, the large-diameter disk (L) Since the driving force of the driving roller 14 for driving the disc (L) is stronger than the force of pulling the arms 31 and 32 of the spring member 37, the contact pin 35
And 36 are pushed to the back. Then, the arms 31 and 32 rotate about the rotation shaft 29.

At this time, the steps 33a and 34a provided in the elongated holes 33 and 34 coincide with each other, and the springs 45 constantly bias the matched steps 33a and 34a forward. The mating pin 42 is fitted, and the arms 31 and 32 are locked by the holding mechanism composed of the steps 33a and 34a and the engaging pin 42 (the state of FIG. 15). Therefore, the large-diameter disk (L) cannot enter the inner portion any more, and the drive roller 14
When the drive force is lowered and the driving force cannot be given, the disc (L) is supported at this position without being pushed forward by the arms 31 and 32.

At this time, the center of the large-diameter disc (L) whose two points are supported by the contact pins 35 and 36 substantially coincides with the turntable 23. When the detection means (not shown) detects that the large-diameter disk (L) is held, the clamp release pin 28 is moved to the second bent portion 4.
4c over the extension shaft 43 (y direction in FIG. 5)
And the upper chassis 25 is lowered by the spring 24, and the disk is pressed onto the turntable 23 by the clamper 26 and clamped. You can play in this state.

Next, from the playing state, a large-diameter disc (L)
When the external operation is performed to discharge the first bent portion 44b, the clamp release pin 28 moves forward and abuts on the first bent portion 44b (the state shown in FIG. 17). To push the engagement pin 42 and the steps 33a and 34
a is released (the state of FIG. 18). Then, since the arms 31 and 32 are constantly urged by the spring member 37 so that the contact pins 35 and 36 approach, the stopper member 30 returns to the initial standby state. The disk (L) is ejected by the drive roller 14.

As described above, the pair of contact pins 35 and 36
, The small-diameter disk (S) or the large-diameter disk (L) is reliably guided on the turntable 23. When the disk is guided and the upper chassis 25 is lowered and clamped, the contact pins 35 and 36 are preferably separated from the outer periphery of the disk (S) or (L). For this purpose, the contact pins 35 and 36
At the height position where the disk (S) or (L) is being fed by the drive roller 14, the contact pins 35 and 36 abut on the outer periphery of the disk (S) or (L). It is necessary that the outer periphery of the disk be separated from the tips of the contact pins 35 and 36 when the position (1) is at the height position completely clamped to the turntable 23.

Alternatively, when the upper chassis 25 descends in the clamping operation, the contact pins 35 and 36
The pin 35 and 3
6 can escape from the outer periphery of the disk. Further, when the small-diameter disk (S) is inserted from the insertion slot 12 and played, even if the small-diameter disk (S) is inserted from any position, that is, a position adjacent to the side chassis 15a as shown in FIG. (S) can be guided to the central position of the passage. This is because the distance between the contact pin 35 contacting the small-diameter disk (S) and the side chassis 15a is arranged to be smaller than the radius of the small-diameter disk (S). Is pressed by the large-diameter portion of the drive roller 14, but the other end is located at the small-diameter portion of the drive roller 14, so that the pulling force at this time is larger than that of the large-diameter disk (L). As a result, the arms 31 and 32 do not expand due to the insertion force of the drive roller 14.

Therefore, when the small-diameter disk (S) comes into contact with the contact pin 35, the advancing direction of the small-diameter disk (S) is guided by the contact pin 35 so as to advance toward the center. Eventually, the abutment pin 36 abuts, and both abutment pins 35 and 36 abut the small diameter disk (S). As described above, the arms 31 and 3 are driven by a force stronger than the driving force of the driving roller 14 with respect to the small-diameter disk (S).
Since the disks 2 are attracted to each other, the small-diameter disk (S) is reliably guided to the center portion, and stops at the position where the disk (S) is arranged on the turntable 23. In this way, the discs (S) and (L) can be stopped on the turntable 23 at the same position, regardless of which of the discs (S) and (L) is used,
Subsequent operations can be similarly performed on any of the disks (S) and (L). Therefore, it is possible to play with any of the discs (S) and (L) without largely changing the conventionally used disc player.
In addition, since a small-diameter disc (S) can be inserted from a position off the center of the insertion slot 12, it is ok to insert the disc, so that the loading operation can be easily performed in the in-vehicle disc player even when the driver inserts the disc.

In the above embodiment, the pair of arms 31 and 32 and the levers 41 and 44 are different between when the small-diameter disk (S) is loaded and when the large-diameter disk (L) is loaded. Stop position is different. Therefore, if the presence of these members is detected by a switch or the like, it is possible to recognize the type of the loaded disk. Various controls can be performed by recognizing the switch and the like. For example, the display 13 shown in FIG.
"LE" or "Normal", "NORMAL", etc. Alternatively, a long line or a short line is displayed on the display 13, and the diameter of the disc can be identified by the length of the line. Alternatively, the type of the disk can be displayed by turning on the LED.

In this embodiment, in order to be able to play on both discs (S) and (L),
The stopper member 30 is formed by two arms 31 and 32, and the arms 31 and 32 are rotated only when a large-diameter disk (L) is used. However, the present invention is not limited to this. Instead, for example, a large-diameter stopper member and a small-diameter stopper member may be provided, and only the small-diameter stopper member may be moved. Alternatively, the disk (S) may be moved linearly by moving the stopper member. Locking may be performed at two positions corresponding to (L) and (L). It is also possible to receive two points on the outer periphery of the disk at the sides of a pair of arms arranged in a V-shape. That is, if the stopper member can be locked in accordance with the diameters of the disks (S) and (L), and both the disks (S) and (L) can be mounted on the turntable 23, the same applies. Has the effect.

[0037]

As described above, according to the present invention, both a small-diameter disk and a large-diameter disk can be installed on the disk drive mechanism. The positioning member is held by the holding mechanism in a state where the large-diameter disk is set on the disk drive mechanism, so that the positioning member erroneously applies a return force to the driving large-diameter disk. There is no.

When the large-diameter disk is introduced, the positioning member can be moved from the standby position by being pushed by the large-diameter disk receiving the feeding force from the disk feeding mechanism. Thus, a mechanism for moving the positioning member can be easily configured. Also, when a large-diameter disk is installed on the disk drive mechanism,
If the positioning member is held on the back side of the apparatus with respect to the center of the disk, it is not necessary to retract the pair of positioning members from the disk discharge path when discharging the disk.

If a biasing member for biasing the positioning member to a position where the small-diameter disk can be positioned is provided, the positioning member does not rattle when positioning the small-diameter disk. Accuracy can be increased. Further, when the holding of the positioning member is released, the positioning member can be reliably returned by the urging force of the urging member.

In this case, if the urging force for maintaining the positioning member at the standby position is set to be larger than the feeding force applied to the small-diameter disk, the disk can be surely moved when the small-diameter disk hits the positioning member. When the positioning member is set to be smaller than the feeding force applied to the large-diameter disk, an operation of pushing the positioning member toward the back of the apparatus by the large-diameter disk can be realized.

Further, when the holding of the positioning member is released by the operation of releasing the clamp, the timing of releasing the clamp and returning the positioning member to the standby position can be set with high precision.

[Brief description of the drawings]

FIG. 1 is a front view showing an operation unit of a disc player;

FIG. 2 is a plan view of a disc player main body,

FIG. 3 is a side view of the disc player main body,

FIG. 4 is a plan view of a disk drive unit,

FIG. 5 is a side view of the disk drive unit,

FIG. 6 is a plan view of a player main body showing a state where a small-diameter disc is inserted;

FIG. 7 is a partial plan view showing a state in which a small-diameter disk is being conveyed;

FIG. 8 is a partial plan view showing a state where a small-diameter disk is positioned,

FIG. 9 is a partial plan view showing the state of movement of the clamp release pin after the small-diameter disk is positioned,

FIG. 10 is a partial plan view showing the state of movement of the clamp pin after the small-diameter disk is positioned,

FIG. 11 is a partial plan view showing a state where a small-diameter disk is separated from a contact pin;

FIG. 12 is a partial plan view showing a state where a large-diameter disk is being conveyed;

FIG. 13 is a partial plan view showing a state where a large-diameter disk has hit a contact pin;

FIG. 14 is a partial plan view showing a state where the positioning pin has started to move by being pushed by a large-diameter disk,

FIG. 15 is a partial plan view showing a state in which a positioning pin is pushed and moved by a large-diameter disk,

FIG. 16 is a partial plan view showing a state where the positioning pins are locked.

FIG. 17 is a partial plan view showing an unlocking operation of the positioning pin.

FIG. 18 is a partial plan view showing a discharging operation of a large-diameter disc;

FIG. 19A is a front view showing a state in which a large-diameter disk is being conveyed by rollers, FIG. 19B is a front view showing a state in which a small-diameter disk is being conveyed,

FIG. 20 is a plan view showing a small-diameter disk adapter conventionally used;

[Explanation of symbols]

 S Small-diameter disk L Large-diameter disk 12 Insertion opening for disk 14 Drive roller constituting disk feed mechanism 20 Disk drive mechanism 23 Turntable 26 Clamper 28 Clamp release pin 31, 32 Arm 35, 36 Positioning member Contact pin 41 Support lever 33a, 34a, 42 Holding mechanism 41, 44 Holding release mechanism

Claims (5)

[Claims] 1. An introduction part into which disks of different diameters are introduced, a disk drive mechanism capable of installing disks of different diameters, and a disk drive mechanism for irrespective of the diameter of a disk introduced from the introduction part. A disk feed mechanism that can transfer the large-diameter disk to a position where the introduced small-diameter disk can be positioned on the disk drive mechanism and, when a large-diameter disk is introduced, the large-diameter disk can be installed on the disk drive mechanism. A pair of moving positioning members, and a holding mechanism for holding the positioning members in a state where the large-diameter disk is installed on a disk drive mechanism;
A holding release mechanism that releases the holding by the holding mechanism and allows the positioning member to return to the standby position. 2. The pair of positioning members are supported so as to be able to move from the standby position toward the back of the apparatus when pressed by a large-diameter disk receiving the feed force of the disk feed mechanism. 2. The holding mechanism according to claim 1, wherein in a state where the large-diameter disk is installed on the disk drive mechanism, the pair of positioning members are located on the inner side of the apparatus with respect to the center of the disk and held by the holding mechanism. Disc player. 3. An urging member for maintaining the positioning member at the standby position is provided, and when the holding by the holding mechanism is released, the urging member moves the standby position with respect to the positioning member. 3. The disc player according to claim 1, wherein a return force is applied to the disc player. 4. An urging force when the urging member keeps the positioning member at the standby position is larger than a feeding force applied to a small-diameter disk by the disk feeding mechanism and smaller than a feeding force applied to a large-diameter disk. 4. The disc player according to claim 3, wherein the positioning member is set to be movable to the rear side of the apparatus by the feeding force when the large-diameter disc is fed by the disc feeding mechanism. 5. The disk drive mechanism has a turntable that is driven to rotate and a clamper that presses the center of the disk on the turntable, and the holding force is generated by a driving force that moves the clamper away from the turntable. 5. The disc player according to claim 1, wherein the release mechanism is operated to release the holding.